Tried the Aero troubleshooter, it didn't any issues with the desktop settings.
Yes my d drive partition is my data drive where I store all non program data, movies, music, pictures, etc. I now also store my user data there and all the associated files/folders, there. I followed the guide you posted to move the folders, and the user folder to the d drive partition.
I've no idea where it would be located, but I'm guessing there is some file that has a listing of what to show in the personal folder, and for some reason my d drive partition is listed there not once but twice lol. Like I said before, it's not causing any performance issues, it's just odd... because I can't move it, it's not a shortcut, it's the actual drive, as if I was looking at the drives in the computer directory.